Mining apparatus



Get. 31, 1933. c. F. OSGOOD MINING APPARATUS OriginalFiled Aug. 4, 1

3 Sheets-Sheet l (lazy Oct. 31,1933. Y c QSGQOD 1,932,596

MINING APPARATUS Original Filed 4, 5 sheets-Sheet 2 67 120622121Zarh/Z'flJIQ azzy.

1933- C. F. oscsoonx 96 MININ G APPARATUS Original Filed Aug. 4, 1930 3Sheets-Sheet 3 64 42 I 1 zzv 07 t 22 'Patented Oct. 31, 1933 TES UNITEDSTA 1,932,596 MINING APrAaArUs Charles F. Osgood, Claremont, N. 11.,assignor-to. Sullivan Machinery Company, a corporation of MassachusettsApplication August 4, 1930, seria No. 472,805 Renewed ctober'28, 1932 asClaims.

This invention relates to apparatus and more particularly has referenceto improvements;

in the adjustable supporting structure for the cutting appliances of anapparatus for mining coa An object of this invention is to provide animproved mining apparatus. Another object is -to proyide an improvedmining apparatus of the so-called combined horizontal and shear cutter 0type. A further object is to provide an improved adjustable supportingstructure for the cutting appliances of such an apparatus whereby thekerf cutter may be positioned to operate to cut kerfs in any desiredhorizontal plane betweenthe mine roof and mine floor and to cut verticalkerfs near the center of the entry. Another object is to provide animproved kerf cutting mechanism for a coal mining apparatus wherein arotatable cutter head is employed for adjusting the kerf cutter intohorizontal and vertical cutting positions and including an improvedadjustable supporting structure for the cutter head whereby the lattermay be adjusted into various positions between the mine roof and minefloor while the head axis at all times remains parallel to thelongitudinal axial line of the apparatus. A further object is to providein an apparatusof the character set forth, an improved parallel motionsupporting structure for the rotatable cutter head. Still another objectis to provide an improved driving means for the kerf cutting mechanismand improved/"adjusting and swingingj mechanisms for-the kerf cutter.These and r other objects of this inventionwill, however, hereinaftermore fully appear.

'In the accompanying drawings there is shown for purposes ofillustration one form which the invention may assume in practice.

In these drawings,-

. Fig. 1 is a side elevational view of'the illustrative embodiment ofthe improved mining apparatus; Fig. 2 is an enlarged plan view of thecutting 5 mechanism and the improved adjustable supporting structuretherefor, parts being shown in section to illustrate structural details;Fig. 3 is an' enlarged sectional view taken substantially on line 33 'ofFig. 2;

Fig. 4 is a horizontal sectional view taken sub-e stantially on line 4-4of Fig. 3;

Fig. 5 is a vertical sectional view taken substantially on line 55 ofFig. '3;

Fig-6 is a detail sectional view taken substan- '5 tially on line 66 ofFig. 2;

Fig; 7 is a detail view taken on line 7-7 of Fig. 6; and I Fig. 8 is atransverse vertical sectional'view taken substantially on line 8-8 ofFig. 2.

In this illustrative embodiment of the invention there is shown a coalmining apparatus of the so-- called combined horizontal and shear cuttertype adapted to operate while supported and guided by the mine trackwayand generally comprising a truck 1, kerf cutting mechanism 2, and animproved adjustable supporting structure generally designated 3 for thecutting mechanism. The truck 1 is mounted on wheels 4 adapted to travelalong a mine trackway 5. Carried by the truck is a motor-6 which isadapted to drive through mechanism generally similar to that disclosedin the patent to Oldroyd 1,460,075, the truck wheels and throughimproved connections, hereinafter described, the cutting mechanism andthe adjusting mechanism therefor. If desired the truck body may bemounted on a turntable in the manner described in the Oldroyd Patent1,460,077, or in the manner described in my copending application Ser.No. 440,310, filed March 31, 1930 to enable the cutting mechanism tooperate at either side of the trackway. The truck body may also beprovided with suitable elevating mechanism so that the cutting mechanismmay be adjusted into different elevated positions relative to the truckwheels, for instance, power elevating mechanism of the same generalcharacter as that disclosed in my copending applications Ser. No.432,541, filed March 1, 1930 and Ser No. 409,564, filed November 25,1929.

In the presentconstruction, formed integral with the forward end of thetruck body are parallel longitudinal frame portions or side walls 8, 8which herein form a rigid head. Journaled within these frame portions orside walls 8 is a transverse hinge shaft 9 arranged with its axishorizontal. Pivotally mounted at its rear end on the hinge shaft 9 is amainsupporting link member or arm 10 and, this link member has piv-,otal connection at its front end with a transverse shaft 11 connectedto the cutter supporting frame 12. A secondary link member or arm 13arranged substantially parallel with the link 10 is pivotally connectedatits ends to transverse hinge shafts 14 and 15 respectively connectedto the side walls 4 ter head 16 whereby thelatter may be adjustedcylindrical supporting frame 21 rotatably mount-' ably journaled withinthe cutter head frame 20.

at any desired position between the mine roof and mine floor while thehead axis is maintained parallel to the longitudinal axial line of theapparatus. This parallel motion structure may be generally similar tothat disclosed in the patent to Oldroyd 1,460,076, the improvementherein from one aspect residing in the mounting of the parallel links ona rigid head and the rotating cutter head, on the outer ends of thelinks thereby enabling the link structure to be made extremely heavy andstrong due to the elimination of the rotating neck frame and allcomplicated mechanism for rotating bodily the comparatively heavy linkstructure relative to the truck.

Now referring to the specific cutting mechanism, it will be noted thatthe support 12 has attached thereto a cylindrical bearing sleeve 17 androtatably mounted on this sleeve is a cylindrical supporting frame 18having an inwardly directed annular retaining flange 19 and attached tothe cutter head frame 20. Mounted on the cutter head frame for rotationabout an axis at right angles to the axis of the cutter head is a ed ina bore 22 formed in the cutter head frame. A thrust ring 23 attached tothe cutter head frame retains the frame 21 in its bore. Attached totheframe 21 is a support or hanger 24 which carries the cutter bar 25.Mounted for orbital movement on the margin of the cutter bar 25 is ausual cutter chain 26 carrying usual cutting .appliances.

The mechanism for actuating the cutter chain comprises a shaft 27connected to the motor shaft and carrying at its forward end a bevelpinion 28 meshing witha bevel gear 29 loosely mounted on the hinge shaft9. Meshing with the bevel gear 29 is a bevel gear 30 fixed to a shaft 31suitably journaled in bearings 32 carried by the link member 10, asclearly shown in Fig; 2. The forward end of the shaft 31 carries a bevelpinion 33 meshing with a bevel gear 34 loosely mounted on the hingeshaft 11. Meshing with the bevel gear 34 is a bevel gear 35 (see alsoFigs. 3 and 4) fixed to a shaft 36 extending along the axis of therotatable cutter head 16. This shaft 36 is journaled at its ends withinthe support 12 and cutter head frame 20 as shown in Fig. 3. Herein fixedto the front end of the shaft 36 is a bevel pinion 37 meshing with alarge bevel gear 38 journaled on a shaft 89 arranged with its axiscoincident with the axis of bar swing. The shaft 39 drives a sprocket 40which in turn engages and drives the cutter chain 26 in a wellknownmanner. .The gear 38 is connectible to the shaft 39 by a sliding jawclutch 41 having a usual clutch shipper 42 operated by a handle 43. Itwill thus be seen that irrespective of the ad- I justed position of thecutter head relative to the truck, the cutter chain 26 may at alltimes'be driven and that by simply releasing the clutchv 41 the cutterchain may remain idle during running of the motor.

Now referring to the improved mechanism for effecting swinging of the.cutter bar about its pivotal axis relative tc the cutter head it will benoted that fixed to the shaft 39 and driven thereby is a bevel pinion 45constantly meshing with reversely rotatable bevel gears 46, 47 looselyournaledon a transverse shaft 48 in turn suit- The reverse bevels 46, 47are selectively connectible to the shaft 48 by-means of multiple discclutches 49 and ;50 respectively, of a usual design operated by asuitable shipper mechanism 51 controlled by a handle 52. Connectible tothe shaft 48 is a worm 53 meshing with a worm wheel 54 fixed to a shaft55 arranged parallel with the shaft 39 and likewise journaled in thecutter head frame. Also fixed to the shaft 55 is a spur pinion 56meshing with the teeth of an internal gear 57 herein formedintegral'with the cylindrical supporting frame 21 for the cutter bar 25.The worm 53 is connectible to the shaft 48 by a sliding clutch element58 and cooperating clutch elements 59 and 60 carried by the worm andshaft respectively. The sliding clutch element 58 is provided with usualshipper mechanism 61 operated by a handle 62. It will thus be seen thatdepending upon which friction clutch49, 50 is applied the cutter. barmay be sw'ung about its pivot at a speed appropriate for cutting ineither of opposite directions. The improved mechanism for rotating thecutter head 16 about its axis relative to the supporting structure 3herein comprises a worin 63 connectible to the shaft 48 and meshing witha worm wheel 64 fixed to a longitudinally extending shaft 65 arrangedparallelwith the shaft.36. This shaft is suitably journaled within thecutter head frame and carries a pinion 66 meshing with the teeth of aninternal gear 67 herein formed integral with the cylindrical bearingsleeve 17 on which the cutter head 16 is rotatably mounted. The worm 63-is connectible to the shaft 48 -by a sliding clutch element 67cooperating with clutch elements 68 and 69 carried by the worm and shaftrespectively. This sliding clutch elementis provided with usual shippermechanism 70 op erated by a handle 71. It will therefore be evident thatthe cutter head may be rotated about its axis in either of oppositedirections under the control of friction clutches 49, 50. The wormgearings 53, 54'of the bar swinging mechanism and 63, 64 of the headrotating mechanism are self-locking, and upon release of the clutches61, 67 maintain automatically the cutter bar and head in their positionsof adiustment.

Mechanism is provided for adjusting the supporting structure 3.by powerto vary the elevation of the cutter head 16 and herein comprises a wormherein connectible by a sliding jaw clutch 76 to the shaft 27. Theclutch 76 is provided with usual shipper 'mechanism 77 operated by ahandle 78. The worm 75 meshes with worm wheels 79 and 80 fixed toparallel .vertically extending shafts 81 and 82 respecsegments 91 and 92respectively, herein formed integral with the link member 10. Thus itwill be seen that when the clutch 76 is connected the link member 10 maybe swung upwardly and downwardly'about its hinge, depending upon thedirection of motor rotation, through the worm gearing 77, 79, 80, shaft81, 82, spur gearing 83, 84, 85, 86, shaft 87, 88, and worms 89 and 90meshing with the worm gear segments secured to the link. The teeth ofthe worms 89, 90 and the worm gear segments are self-locking andautomatically maintain upon release of the clutch 76, the link 10 in itsdifferent adjusted positions.

As shown most clearly in Fig. 7, the ends of the hinge shaft 14 whichproject within the bearing portions at the sides of the link 13 areecfour bearings of the parallel link structure out oftrue suflicient tointentionally slightly tilt the cutter Head axis out of parallelrelation with the longitudinal axial'line of the apparatus; this beingat times desirable when there is a slant in the upper or lower face ofthe veinof coal or if there is a slight slant in the track on which. theapparatus is guided. Adjustment of the hinge shaft\'14 is in thisinstance effected manu-' ally by a worm wheel 100 fixed to one end ofthe shaft, and meshing with this worm wheel is a worm 101 fixed to ashaft suitably journ'aled ina housing 102 secured to the side of thelink member 13. The worm shaft is provided'with suitable means for thereception of a suitable wrench or other turning instrument. The wormgearing 100, 101 is self-lockingand automatically retains the shaft inits different adjusted positions. It will thus be seen that the cutterbar.

the cutter bar in the manner clearly described in the ()ldroyd Patent,1,460,075. The cutter head 16 may be adjusted in any desired position between the mine roof and mine floor simply by connecting the clutch 76 toeffect swinging of the link member 10 about its hinge,'the-link member13 cooperating with the link 10 to form a parallel motion structure tomaintain the axis of the cutter head at all times parallel to thelongitudinal axial line of the apparatus. The cutter bar 25 may beadjusted to any desired position about the head axis simply byconnecting the clutch ,6? and applying one or the other of frictionclutches 49, 50. i The cutter 'chain may be connected in driving.relation to the motor at will simply by connecting the clutch 41. Thecutter bar 25 may be swung about its pivot relative to the cutter headby connecting the clutch 58 and applying one. or the other ,of thefriction clutches 49, 50. It will thus be seen that the cutter bar maybe positioned to cut horizontal kerfs above and below the head axis andvertical kerfs at either side of the head axis and in any desiredintermediate position. As the operation of a mounted track cutter iswell-known to. those skilled in the art detailed description of thevarious operations of the apparatus is considered unnecessary other thanto state that a horizontal kerf maybe cut in accordance with the arcwall method at the level of the mine bottomin front of the end of thetrackway, that horizontal kerfsmay be cut at-the level of the mine roofand that vertical or shear cuts may be made near thecenter of the entry.

' a As aresultof this invention it will be noted I that an improvedmining apparatus is provided having an improved adjustable supportingstructure for the rotatable cutter head whereby the latter ma'y beeasily adjusted'into any desired position between the mine roof and'minefloor. It

will-further be noted that providing the improved to make the partscomparatively heavy and.

strong due to the elimination of the rotating neck structure by whichthe adjusting parallel link structure was heretofore carried and themechanism for rotating the neck structure.

ratus may operate in accordance with the arc wall method to cut kerfs atthe level of the mine bottom in advance of the front end of thetrackway, to cut at the level of the mine roof or vertical kerfsadjacent the center of the entry. These and other uses and advantages ofthe improved mining apparatus will be clearly apparent to those skilledin the art.

While there is in this application specifically described one form whichthis invention may assume in practice, it will be understood that thisform of thesameis shown fonpurposes of illustration and that theinvention may be modified and embodied in various other forms withoutdeparting from its spirit or the scope of the appended claims. I

What I claim as new and desire to secure by Letters Patent is:

1. In a mining apparatus, a portable support, a kerf cutter adjustableinto horizontal and vertical cutting positions, an adjustable supportingstructure at one end plurally articulated to said support and at itsother end supporting said kerf cutter for adjustment into parallelhorizontal planes, said kerf cutter being adjustable relative It will.rfurther-be noted that the improved mining appato said supportingstructure into aforesaid cutting positions, and means for adjusting saidsupporting structure about its plural articular connections with saidsupport to effect aforesaid ad-- justment of said kerf cutter intoparallel horizontal planes.

2. In a mining apparatus, a portable support,

a frame, a rotatable cutter head mounted on said frame for rotationrelative thereto, a kerf cutter pivotally mounted on said cutter head,an adjustable supporting structure at one end plurally articulated tosaidsupport about parallel axes extending-transversely of said supportand at its otherend sup-porting said frame for adjusting said. cutterhead into differenteievated positions, and means for adjusting saidsupporting structure about its plural articular connections withsaid'support to efifectaforesaid adjustment of said cutter head intodifferent elevated positions;

3. In a mining apparatus, a portable support,-

cal cutting positions, anda parallel link structure hingedly connectedto said support for adjusting said kerf cutter into parallel horizontalplanes, said kerf cutter being adjustable relative to said linkstructure into aforesaid cutting positions.

5. In a mining apparatus, a portable support, a kerf cutter adjustableinto horizontal and vertical cutting positions and an adjustablesupporting structure between said support and kerf cutter includingparallel links for adjusting said kerf cutter into parallel horizontalplanes, said kerf cutter being adjustable relative to said supportingstructure into aforesaid cutting positions, and motor operated devicescarried by said "support for adjusting said supporting structure andincluding gear segments carried by one of said links and gears carriedby said support and mesh ing with said gear segments.

6. In a mining apparatus, a portable support, a kerf cutter adjustableinto horizontal and vertical cutting positions and an adjustablesupporting structure between said support and kerf cutter includingparallel links for adjusting said kerf cutter into parallel horizontalplanes, said kerf cutter being adjustable relative to said supportingstructure into aforesaid cutting positions, and motor operated devicescarried by said support for adjusting said supporting structure andincluding gear segments carried by one of said links and gears carriedby said support and meshing with said gear segments, said gears and-gearsegments being self-locking for automatically maintaining saidsupporting structure in its different positions of adjustment.

7. In a mining apparatus, a portable support;

' upright plane parallel to said longitudinal axial line.

8. In a mining apparatus, a portable support, parallel links pivotallyconnected to said support, a frame supported by said links, a cutterhead mounted on said frame for rotation relative thereto about ahorizontal axis and a kerf cutter pivotally mounted on said cutter head,and motor operated devices for rotating said cutter head about its axisand for swinging said kerf cutter about its pivot.

9. In a mining apparatus, a portable support, a kerf cutter adjustableinto horizontal and vertical cutting positions, an arm pivotallyconnected to said support to swing in longitudinally extending verticalplanes relative thereto" and supporting said kerf cutter, saidkerfcutter being adjustable relative to said arm into aforesaid cuttingposi tions, devices for swinging said arm about its pivot to vary thecutting position of said kerf cutter, and devices operative when suchswinging occurs with the kerf cutter adjusted for horizontal cutting totilt the kerf cutter about an axis parallel to the arm swing pivot tomaintain said kerf cutter during such adjustment parallel to a commonstraight line lying in a longitudinally extending verticalplane,.whereby said kerf cutter may make differently elevated horizontalcuts in planes above said arm swing pivot.

10. In a mining apparatus, a portable support, a cutter head rotatableabout a longitudinal axis, a kerf cutter pivotally mounted on saidcutter head, an arm pivotally connected to said'support to swing inlongitudinally extending vertical planes relative thereto and supportingsaid cutter head and relative to which the latter is rotatable, devicesfor swinging said arm about its pivot to vary the elevation of saidcutter head, and devices for maintaining the axis of said cutter headparallel to a common stationary straight line during such adjustment.

esasee 11. In a mining apparatus, a portable support, a motor carriedthereby, a kerf cutter adjustable into horizontal and vertical cuttingpositions, an adjustable supporting structure plurally articulated atits rear end to said support and'supporting at its forward end said kerfcutter for adjustment into parallel horizontal planes, said kerf cutterbeing adjustable relative to said supporting structure into aforesaidcutting positions, devices driven by said motor for adjusting saidsupporting structure about its plural articular connections with saidsupport to effect aforesaid adjustment of said kerf cutter into parallelhorizontal planes, and devicesdriven by said motor for actuating saidkerf cutter.

12. In a mining apparatus, a portable support, a motor carried. by saidsupport, a frame, a rotatable cutter'head mounted on said frame, a kerfcutter pivotally mounted on said cutter head, an adjustable supportingstructure plurally articulated at its rear end to said support andsupporting at its forward end said frame for adjusting said cutter headinto different elevated positions and relative to which said cutter headis rotatable, devices driven by said motor for adjusting said supportingstructure about its plural articular connections with said support toeffect aforesaid adjustment of said cutterhead into different elevatedpositions, and devices driven by said motor for actuating said kerfcutter.

13. In a mining apparatus, a portable support, a motor carried by saidsupport, a frame, a rotatable cutter head mounted on said frame, a kerfcutter pivotally mounted on said cutter head, an

adjustable supporting structure plurally articulated at its rear end tosaid support and supporting at its forward end said frame for adjustingsaid cutter head into different elevated positions and relative to whichsaid cutter head is rotatable, devices driven by said motor foradjusting said supporting structure about its plural articularconnections with said support to effect aforesaid adjustment of saidcutter head into different elevated positions, devices driven by saidmotor for actuating said kerf cutter, and devices driven by said motorfor rotating said cutter head about its axis relative to said supportingstructure.

14. In a mining apparatus, a portable support, a motor carried by saidsupport, a frame, a rotatable cutter head mounted on said frame, a kerfcutter pivotally mounted on said cutter head, an adjustable supportingstructure plurally articulated at its rear end to said support andsupport-' ing at its forward end said frame for adjusting said cutterhead into different elevated positions and relative to which said cutterheadis rotatable, devices driven by said motor for adjusting saidsupporting structure about its plural articular con-= nections with saidsupport to effect aforesaid adjustment of said cutter head intodifferent elevated positions, devices driven by said motor for actuatingsaid kerf cutter, and devices driven by said motor for rotating saidcutter head about its axis relative to said supporting structure and forswinging said kerf cutter about its pivot.

15. In a,mining apparatus, a portable support, a kerf cutter adjustableinto horizontal and vertical cutting positions, a parallel linkstructure intervening said support and kerf cutter and supporting thelatter for adjustment into parallel horizontal planes, said kerf cutterbeing adjustable relative to said link structure into aforesaid cuttingpositions, a motor carried by said support, devices driven by said motorfor adjusting said link structure, and devices driven by said motor foractuating said kerf cutter.

16. In a mining apparatus, a portable support, a frame, a rotatablecutter head'mounted on said frame, a kerf cutter pivotally mounted onsaid cutter head, an adjustable supporting structure at its rear endplurally articulated to said support on parallel axes extendingtransversely of the support and at its forward end suporting said framefor adjusting said cutter head into different elevated positions, andmotor operated devices carried by said cutter head for rotating saidhead about its axis. 17. In a mining apparatus, a portable support, aframe, a rotatable cutter head mounted on said frame, a kerf cutterpivotally mounted on said cutter head, an adjustable supportingstructure at its rear end plurally articulated to said support onparallel axes extending transversely of the support and at.its forwardend supporting said frame for adjusting said cutter head into differentelevated positions, and motor operated devices carried by said cutterhead for rotating said head about its axis and for swinging said kerfcutter about its pivot.

18. In a mining apparatus'a portable support, a kerf cutter, anadjustable supporting structure between said support and kerf cutterincluding an arm pivotally connected to said support for swingingmovement upon a horizontal axis extending transversely of said support,devices for swinging said arm about its pivot to vary the elevation ofsaid kerf cutter, devices for adjusting said kerf cutter relative tosaid adjustable supporting structure upon a second horizontal axis tomaintain said kerf cutter at all times during such adjust-- ment inhorizontal cutting position and parallel to a common straight line, anddevices carried at the outer end of said arm and forwardly of saidsecond horizontal axis for adjusting saidkerf cutter about a thirdhorizontal axis into horizontal and vertical cutting positions.

19. In a mining apparatus, a portable support,

a kerf cutter adjustable into horizontal and verarm about its pivotincluding a gear segment carried by said arm and a gear carried by saidsupport and meshing with said gear segment.

20. In a mining apparatus, a portable support,

a kerf cutter; an adjustable supportingv structure between said supportand said kerf cutter for swinging said kerf cutter about a transversehorizontal axis extending transversely of and on said support intodifferent elevated positions, respectively in horizontal planes adjacentthe mine bot-' tom and in higher horizontal planes adjacent saidtransversely extending axis, while said kerf cutter at all times remainsparallel to a common straight line, and devices at the outer extremityof said supporting structure for adjusting said kerf cutter intohorizontal and vertical cutting positions.

21. In a mining apparatus, a portable sup- .port, parallel linkspivotally connected to said support for swinging movement. in a verticaldirection relative thereto, a frame supported by said links, a cutterhead mounted on said frame for rotation relative thereto about ahorizontal structure and adjustable relative thereto into horizontal andvertical cutting positions, said arm structure having a range ofswinging movement about said transverse horizontal axis sufficient toposition said kerf cutter, solely by swinging movement about suchtransverse horizontal axis, optionally in a horizontal positionsubstantially on the mine bottom or in a position wholly above ahorizontal plane including said transverse horizontal axis. r

' 23. In a mining apparatus, a portable base, an arm structure pivotallymounted on the'forward end of said base to swing in a vertical directionrelative thereto about a horizontal axis extendingtransversely ofsaidbase, and a kerf cutter mounted on' the outer extremity of said armstructure and. adjustable relative thereto into a horizontal andvertical cutting positions, a motor carried by said base, and relativeto which said armstructure is swingable, and devices driven by saidmotor for actuating said kerf cutter.

2d. In a mining apparatus, a portable base, an arm structure pivotallymounted on the forward end of said base to swing in a vertical directionrelative thereto about a horizontal axis extending transversely of saidbase, and a kerf cutter 25 In a apparatus, a portable base, an 120 armstructure pivotally mounted on the forward end of said base to swing ina vertical direction relative thereto about a horizontal axis extendingtransversely of said base, a cutter head mounted on the outerextremity-of said arm structure for rotation relative thereto about ahorizontal axis, and a kerf cutter pivotally mounted on said cutter headand rotatable therewith relative to said am structure into horizontaland vertical cutting positions, said arm structure having a range ofswinging movement about said transverse horizontal axis suflicient toposition said kerf cutter, solely by swinging movement about suchtransverse horizontal axis, optionally in a horizontal positionsubstantially on the mine bottom or in a' position wholly above. ahorizontal plane including said transverse horizontal axis.

26. In a mining apparatus, a portable base, an'

arm structure pivotally mounted on the forward end of said base to swingin a vertical direction "relative thereto about a horizontal axisextending transversely. of said base, a cutter head mounted on the outerextremity of said arm structure for rotation relative thereto about ahorizontal axis, a kerf cutter pivotally mounted on .said cutter headand rotatable therewith relative to said arm structure into horizontaland vertical cutting positions, and mechanism for automaticallymaintaining the axis of said outter head parallel to a common stationarystraight line during swinging of said arm structure about saidhorizontal transverse axis.

2'7. In a mining apparatus, a portable base, parallel arms pivotallymounted on the forward end of said base for swinging movement relativethereto about horizontal 'axes, and a kerf cutter mounted on the outerextremities of said arms for adjustment relative thereto into horizontaland vertical cutting positions.

28. In a mining apparatus, a portable base, parallel arms pivotallymounted on the forward end of said base for swinging movement relativethereto about horizontal axes, a kerf cutter mounted on the outerextremities of said arms for adjustment relative thereto into horizontaland vertical cutting positions, and, devices for adjusting said arms outof parallel relationship to effect tilting of said kerf cutter relativeto the horizontal.

29. In a mining apparatus, a portable base, parallel arms pivotallymounted on the forward end of said base for swinging movement relativethereto about horizontal axes, and a kerf cutter" mounted on the outerextremities of said arms for adjustment relative thereto into horizontaland vertical cutting positions, said arms maintaining automatically saidkerf cutter parallel to a common straight line during swinging of saidarms about their pivots relative to said base.

30. In a mining apparatus, a portable base, parallel arms pivotallymounted on the forward end of said base for swinging movement relativethereto about a horizontal axis, a cutter head mounted on the outerextremities of said arms for rotation'relative thereto about ahorizontal axis, and a kerf cutter pivotally. mounted on said cutterhead and rotatable therewith relative to said arms into horizontal andvertical cutting positions.

31. In a mining apparatusaportable base, parallel arms pivotally mountedon the forward end of said base for swinging movement relative theretoabout a horizontal axes, a cutter head mounted on the outer extremitiesof said arms for rotation relative thereto about a horizontal axis, akerf cutter pivotally mounted on said cutter head and rotatabletherewith relative to said arms into horizontal and vertical cuttingpositions, and devices for adjusting said arms out of parallelrelationship to effect tilting of said kerf cutter relative to thehorizontal.

32. In a mining apparatus, a portable base, parallel arms pivotallymounted on the forward end of said base for swinging movement relativethereto about horizontal axes, a cutter head mounted on the outerextremities of said arms for rotation'relative thereto about ahorizontal axis, and a kerf cutter pivotally mounted on said cutter headand rotatable therewith relative to said arms into horizontal andvertical cutting positions, and said arms maintaining automatically saidcutter head axis parallel to a common straight line during swinging ofsaid arms about their pivots relative to said base.

33. In a mining apparatus, a supporting frame,

a cutter head mountedon said frame for rotation relative thereto, a kerfcutter pivotally mounted on said cutter head and mechanism for rotatingsaid head and swinging said kerf cutter and comprising a shaft iournaledon said head, relatively rotatable'gears coaxial with and selectivelyconnectible to be driven by said shaft, clutches for effectingrotationof said shaft in either of opposite directions, gearing drivenby one of saidgears for efiecting head rotation, and gearing a cutterhead mounted on said frame for rotation relative thereto, a kerf cutterpivotally mounted on said cutter head and mechanism for rotating saidhead and swinging said kerf cutter comprising a shaft joumaled on saidhead, gears driven by said shaft, clutch devices for connecting saidgears to said shaft, clutches for effecting rotation of said shaft ineither of opposite directions, gearing driven by one of said gears toefiect head rotation, and gearing driven by said other gear foreifecting swinging of said kerf cutter.

35. In a mining apparatus, a supporting frame, a cutter head mounted onsaid frame for rotation relative thereto, a kerf cutter pivotallymounted on said cutterhead, and mechanism for rotating said head andswinging said kerf cutter comprising a shaft journaled on said head,relatively rotatable gears coaxial with and selectively connectible tobe driven by said shaft, clutches for eiiecting rotation of said shaftin either of opposite directions, gearing driven by one of said gearsand including a stationary gear secured to said supporting frame forrotating said cutter head about its axis, and gearing driven by saidother gear for swinging said kerf cutter.

36. In a mining apparatus, a portable support, parallel links pivotallyconnected to said support, a frame supported by said links, a cutterhead mounted on said frame for rotation relative thereto about ahorizontal axis, a kerf cutter pivotally mounted on said cutter head,and motor operated devices for rotating said cutter head about its axis.

Y 37. In a mining apparatus, a portable support, parallel linkspivotally connected to said support, a frame supported by said links, acutter head mounted on said frame for rotation relative thereto about ahorizontal axis, a kerf cutter pivotter head mounted on said frame forrotation rela- 1 tive thereto about a horizontal axis, a kerf cutterpivotally mounted on said cutter head, said cutter head being rotatablerelative to said links and motor, and devices driven by said motor forrotating said cutter head about its axis.

39.- In a mining apparatus, a portable support, a motor, parallel linkspivotally connected to said support, a frame supported by said links, acutter head mounted on said frame for rotation relative thereto about ahorizontal axis, a kerf cutter pivotally mounted on said cutter head,said cutter head being rotatable relative to said links and motor,, anddevices driven by said motor for rotating said cutter head about itsaxis and for swinging said kerf cutter about its pivot,

40. Ina mining apparatus, a portable support, a parallel link structurepivotally connected to said support, a frame supported by said linkstructure, a cutter head mounted on said frame in opposite directions tomove said cutter head into different operative positions while said headaxis is always maintained parallel to a common straight line.

41. In a mining apparatus, a portable base, an arm structure pivotallymounted on said base to swing relative thereto, a frame supported on theouter extremity .of said arm structure and to which said arm structureis pivotally connected upon an axis perpendicular to the planes ofswinging movement of said arm structure, said frame being swingablerelative to said arm structure, a cutter head mounted on said frame forrotation relative thereto about a horizontal axis, a kerf cutterpivotally mounted on said cutter head for swinging movement relativethereto, and motor operated devices for rotating said cutter head aboutits axis and for swinging said kerf cutter about its pivot.

42. In a mining apparatus, a portable base, an arm structure pivotallymounted on said base to swing relative thereto in vertical planes, aframe supported on the outer extremity of said arm structure and towhich said arm structure is pivotally connected, said frame beingswingable relative to said arm structure, a cutter head mounted on saidframe for rotation relative thereto about a horizontal axis, a kerfcutter pivotally mounted on said cutter head for swinging movementrelative thereto, motor operated devices 1 for rotating said cutter headabout its axis and -is pivotally connected, said frame being swingablerelative to said arm structure, a", cutter head mounted on said framefor rotation relative thereto about a horizontal axis, a kerf cutterpivotally mounted on said cutter head for swinging 'movement relativethereto, motor operated devices for rotating said cutter head about itsaxis and for swinging said kerf cutter about its pivot,

motor operated means for swinging said arm structure relative to saidbase, and motor operated means for moving said base over the mine floorto eifect feeding of said kerf cutter into the material to be cut. t

44. In a mining apparatus, a portable base, an

1 arm structure pivotally mounted on said base zontal axis, a kerfcutter pivotally mounted on said cutter head for swinging movementrelative thereto, and motor operated devices for rotating said cutterhead about its axis and for swinging-said -kerf cutter about its pivot,said head rotating and kerf cutter. swinging devices includingamotor'supported on said base and relative to which said. arm structureis swingable.

45. In a mining apparatus, a portable base,-

an arm structure pivotally mounted on said base to swing relativetheretoin vertical planes, a frame supported on the outer extremity ofsaid arm structure and to which said arm structure is pivotallyconnected, said frame being swingable relative to said arm structure, acutter head mounted on said frame for rotation relative thereto about ahorizontal axis, a kerf cutter pivotally mounted on said cutter head forswinging movement relative thereto, motor operated devices for rotatingsaid cutter head about its axis and for swinging said kerf cutter aboutitspivot, and motor operated means for'swinging said arm structurerelative to said base, said arm swinging devices including a motorsupported on said base and relative to which said arm structure isswingable.

46. In a mining apparatus, a portable sup- 7 port, parallel linkspivotally connected to said on said cutter head, said parallel linksmaintaining said cutter headaxis always parallel to a common straightlirfe during swinging of said-links about their pivots.

4']. In a mining apparatus, a portable base, an

arm structure pivotally mounted on said base for swinging movementrelative thereto, a frame supported on the outer extremity of said armstructure and to which the latter is pivotally con 'nectedupon an axisperpendicular to the planes of swinging movement of said arm structure,said frame being swingable relative to said arm structure, a cutter headsupported by 'said frame for rotation relative thereto about ahorizontal axis, a kerf cutter mounted on said cutter head andadjustable with said head into horizontal and vertical cuttingpositions, and motor operated devices for rotating said'head about itsaxis and for driving said kerf cutter.

48. In a. mining apparatus, aportable base, an arm structure pivotallymounted on said base for swinging movement relative thereto, a framesupported on the outer extremity of said arm struc-j turev and to whichthe latter is pivotally connected upon an axis perpendicular to theplanes of swinging movement of said arm structure, said frame beingswingable relative to said am structure, va cutter head supported bysaid frame for rotation relative thereto about a horizontal axis, a kerfcutter pivotally mounted on said cutter head and adjustable with saidhead into horizontal and vertical. cutting positions, a motor on saidbase, and connections driven by said motor for swinging said kerf cutterand including connections extending along and supported by saidstructure. K I 49. In a mining apparatus, a portable base, an armstructure pivotally mounted on said base for swinging movement relativethereto, a frame supported on the outer extremity of said arm structureand to which the latter is pivotally connected upon an axisperpendicular to the planes of swinging movement of said arm structure,said frame being swingablerelative'to said arm structure, a cutter headsupported by said frame for rotation relative thereto about a horizontalaxis;-

positions, motor operated devices for rotating said j,

cutter head about its axis, and motor operated devices for swinging saidkerf cutter relative to said cutter head in any position of said cutterhead about its axis.

50. In a mining apparatus, {a portable base, a

parallel motion arm structure overhanging said base and pivotallymounted at its rearward extremity on said base to swing in a verticaldirection relative thereto, and a kerf cutter mounted on the outeroverhanging extremity of said arm structure and adjustable relative tosaid' arm structure into horizontal and vertical cutting positions.

51. In a mining apparatus, a portable base, a parallel motion armstructure overhanging said base and pivotally mounted at itsrearwardextremity on said baseto swing in a vertical direction relativethereto, a cutter head"mounted on the outer overhanging extremity ofsaid arm structure f or rotation relative thereto about a horizontalaxis, and a kerf cutter pivotally mounted on said cutter head androtatabletherewith about the head axis relative to said arm structureinto horizontal and vertical cutting posi-- tions.

52. In a mining apparatus, a portable support,

' parallel links pivotally connected to said support,

a frame supported by said links, a cutter head mounted on said'frame forrotation relative thereto about a horizontal axis, a kerf cutterpivotally mounted on said cutter head, and motor operated devices forrotating said cutter head about its axis relative to said frame.

53. In a mining apparatus, a portable support, parallel links pivotallyconnected to said support, a frame supported by said links, a cutterhead mounted on said frame for rotation relative there to about ahorizontal axis, a kerf cutter pivotally mounted on said cutter head,and motor operated devices for swinging said kerf cutter about its pivotrelative to-said cutter head.

54. In a mining apparatus, a portable base, an arm structure overhangingsaid base and pivotally mounted at'its rearward extremity on said baseto swing in a vertical direction relative thereto about a horizontalaxis extending transversely of said apparatus, a k'erf cutter mounted onthe outer overhanging extremity of said arm struc-- ture including agear secured against rotation relative to said arm structure,-a gearadjustable with said kerf cutter and meshing with said gear and devicesadjustable with said kerf cuttcr for driving said last mentioned gear.

55. In a mining apparatus, a portable base, an arm structure overhangingsaid base and pivotally mounted at its rearward extremity on said'base-t'o swing in a vertical direction relative thereto about ahorizontal axis extending transversely of said apparatus, and kerfcutting mechanism including a rotatable cutter head mounted on the outeroverhanging extremity of said arm structure, a kerf cutter pivotallymounted on said such swinging of said arm structure about saidtransverse horizontal axis, selectively in a horizontal positionsubstantially at the level of the mine bottom or in a position whollyabove a horizontal planeuncluding said transverse hori-.

zontal axis, and motor operated devices for ad' justing said cutter headrelative to said armstructure including a gear fixed against rotationrelative to said arm structure, a gear journaled within said cutter headand meshing with said gear and devices carried by said putter head forrotating said second mentioned gear.

.56. In a mining apparatus, a portable base, parallel links pivotallyconnected to said base, a frame supported by said links, a cutter headmounted on said frame for rotation relative thereto about a horizontalaxis extending longitudinally of the apparatus, and a kerf cutterpivotally mounted on said cutter head and adjustable with said head intodifierent horizontal cutting positions about the head axis.

57. In a mining apparatus, a portable base, parallel links pivotallyconnected to said base on parallel horizontal axes, a frame supported,

by said links, a cutterhead mounted on said frame for rotation relativethereto about a horizontal axis extending longitudinally of theapparatus, a kerf cutter pivotally mounted on said cutter head andadjustable with said head into different cutting positions about thehead axis, and a motor mounted on said base 'andrelative to which saidlinks are swingable for actuating saidkerf cutter. a

58. In a mining apparatus, a portable base, parallel links pivotallyconnected at their rear ends to said base, a frame supported by saidlinks and to which the forward ends of said links are pivotallyconnected, a cutter head mounted on'said frame for rotation relativethereto about a horizontal axis extending longitudinally of theapparatus, a kerf cutter pivotally mounted on said cutter head andadjustable with said head into difierent cutting positions about thehead axis, and a motor mounted on said base and relative to which saidlinks are swingablefor actuating said kerf cutter and for swinging saidlinks relative to saidbase.

59. In a mining apparatus, a portable base,

parallel links pivotally connected to said base, a'

frame supported by said links, a cutter head -mounted on said frame forrotation relative thereto about a horizontal am's, a kerf cutterpivotally mounted on said cutter head and adjustable with said head intodifferent cutting positions about the ,head aids, and a-motor mounted onsaid base and relative to which said links are swingable for actuatingsaid kerf cutter, for swinging said links relative to said base and forrotating said cutter head.

60. In a mining apparatus, a portable base,

parallel links pivotally connected to said base, a

frame supported by said links, a cutter head mounted on said frame forrotation relative thereto about a horizontal axis, a kerf cutterpivotally mounted on said cutter head and adjustable with said head intodifferent cutting positions about the head axis, and a motor mounted onsaid base and relative to which said links are swingable for actuatingsaid kerf cutter, for swinging said links relative to said base, forrotating said cutter head and for swinging said kerf cutter" relative tosaid head.

'61. In a mining apparatus, a portable base, parallel links pivotallyconnected to said base for swinging upon horizontal axes located in twoto said base to swing in longitudinally extending vertical planesrelative thereto and supporting said kerf cutter, said kerf cutter beingadjustable relative to said'arm into aforesaid cutting positions,devices for swinging said arm about its pivot to vary the cuttingposition of said kerf cutter -and including a motor on said base andrelative to which said arm is swingable, and devices for maintainingsaid kerf cutter parallel to a common straight line during such adjust-'ment of said kerf cutter.

63:. In a mining'apparatus, a portable base, a cutter head rotatableabout a longitudinal axis, a kerf cutter pivotally mounted on saidcutter head to swing relative thereto, an arm pivotally connected tosaid base and supporting said cutter head and relative to which thelatter is rotatable, devices for swinging said arm about its pivot tovary the elevation of said cutter head, devices for maintaining the axisof the'cutter head parallel to a common stationary straight line duringsuch adjustment, and devices for tilting said cutter head about atransverse axis relative to said arm to move the head axis out ofparallelism with aforesaid straight line.

6%. In a mining apparatus, a portable base, a parallel link structurepivotally connected to said base, a frame supported by said linkstructure, a cutter head mounted on said frame for rotation relativethereto about a horizontal axis extending longitudinally of theapparatus, a kerf cutter pivotally mounted on said cutter head, a motoron said base relative to which said link structure is swingable, andmechanism driven by said motor and operatively connected to applypressure to the same link irrespective of the direction of linkstructure pivoting, for adjusting said parallel link structure to movesaid cutter head into different operative positions while said head axisis always maintained parallel to a common straight line. i

65. In a mining apparatus, -a portable base, parallel links pivotallyconnected to said base, a frame supported by said links, a cutter headmounted on said frame for rotation relative,

parallel links pivotally connected at one end to said support, a framesupported by said links and to which the other ends of said links arepivotally connected, a cutterhead mounted on said frame for rotationrelative thereto about an axis disposed at right angles to the axes ofswinging movement of said links, and a kerf cutter pivotally mounted onsaid cutter head, said parallel links maintaining said cutter head axisalways parallel to a common straight line during swinging of said linksabout their pivots.

6'7. In a mining apparatus, a portable base, an arm structure pivotallymounted on said base for swinging movement relativethereto, a framesupported on the outer extremity of said arm structure and to which thelatter is pivotally connected, saidframe being swingable relative tosaid arm structure, a cutter head supported by said frame forrotationrelative thereto about an axis disposed at right angles to theaxis of swinging movement of said arm structurga kerf cutter pivotallymounted on said cutter head for swinging movement relative thereto andadjustable with said head into horizontal and vertical cuttingpositions, a motor on said base relative to which said arm structure isangularly movable during its swinging movement, and connections drivenby said motor and connected to said cutter head and kerf cutter forrotating-said cutter head about its axis and for swinging said kerfcutter and including connections extending along and supported by saidarm structure.

68. In a mining apparatus, a portable 'base, parallel links pivotallyconnected to said base, a frame supported by said links, a cutter headmounted. on said frame for 'rotation relative thereto about an axisdisposed at right angles to the axes of swinging movement of said links,a kerf cutter pivotally mounted on said cutter head and adjustable withsaid head into different horizontal cutting positions about the headaxis, and a motor mounted on said base and relative to which said linksare swingable for actuating said kerf cutter;

69. In amining apparatus, a portable base, parallel links pivotallyconnected at one end thereof to said base, a frame supported by saidlinks and connected pivotally to the other ends of the latter, a cutterhead mounted on said frame for complete rotation relative thereto aboutan axis disposed at right angles to the axes of swinging movement ofsaid links, a kerf cutter pivotally mounted on'said cutter head andadjustable with said head into different cutting positions about thehead axis, and a motor mounted on said base and relative to which saidlinks are swingable for actuating said kerf cutter and for swinging saidlinks relative to said base.

70. Ina mining apparatus, a portable base, a parallel link structurepivotally connected to said base, a frame supported by said linkstructure, a cutter head mounted on said frame for rotation relativethereto about an axis disposed at right angles to the axes of swingingmovement of said links, a kerf cutter pivotally mounted on said cutterhead, a motor on said base relative to which said link structure isswingable, and mechanism driven by said motor and including a powerconnection with the same link irrespective of the direction of linkadjustment for adjusting said parallel link structure to move saidcutter head into different operative positions while said head axis isalways maintained parallel to a common straight line.

71. In a mining apparatus, a portable support, a kerf cutter adjustableinto horizontal and vertical cutting positions, an adjustable supportingstructure at one end plurally articulated to said support on parallelaxes and at its other end supporting'said kerf cutter for adjustmentinto parallel horizontal planes, said kerf cutter being adjustablerelative to said supporting structure into aforesaid cutting positions,and means for adjusting said supporting structure about its pluralarticular connections with said supportto effect aforesaid adjustment ofsaidkerf cutter into parallel horizontal planes, said kerf cutter beingtiltable about a transverse axis relative to the supporting structureinto different angular positions relative to aforesaid horizontalplanes.

72. In a mining apparatus, a portable support, a frame, a rotatablecutter head mounted on said frame for rotation relative thereto, a kerfcutter pivotally mounted on said cutter head, an adjustable supportingstructure at one end plurally articulated to said support on-p'arallelaxes and at its other end supporting said frame for adjusting saidcutter head into different elevated positions, and means for adjustingsaid supporting structure about its plural articular connections withsaid support to effect aforesaid adjustment of ,said cutter head intodifferent elevated positions, said cutter head being tiltable relativeto said supporting structure about an axis extending transversely ofsaid supporting structure to vary the angular position of the plane ofcut of said kerf cutter relative to the said support to swing in avertical direction relative thereto, a frame supported by said linkstructure, a cutter head mounted on said frame for rotation relativethereto about a horizontal axis, a kerf cutter pivotally mounted on saidcutter head, and mechanism for adjusting said parallel link structure tomove said cutter head into different operative positions while said headaxis is always maintained parallel to a common straight line.

'74. In a mining apparatus, a portable support, parallel links pivotallyconnected to said support to swing in a vertical direction relativethereto, a frame supported by said links, a cut ter head mounted on saidframe for rotation relative thereto about a horizontal axis extendinglongitudinally of the apparatus, and a kerfcutter pivotally mounted onsaid cutter head, said parallel links maintaining said cutter head axisalways parallel to a common straight line during swinging of said linksabout their pivots.

75. In a'mining apparatus, a. portable base, parallel links pivotallyconnected to said base to swing in a vertical direction relativethereto, a

mounted on said frame for rotation relative thereto about a horizontalaxis extending longitudinally of the apparatus, a kerf cutter pivotallymounted on said cutter head and adjustable with said head into difierentcutting positions about the head axis, and a motor mounted on said baseand relative to which said links are swingable for actuating said kerfcutter.

'77. In a mining apparatus, a portable base,

parallel links pivotally connected to said base to swing in a verticaldirection relative thereto, a frame supported by said links, a cutterhead mounted on said frame for rotation relative a thereto about ahorizontal. axis extending longitudinally of the apparatus, a kerfcutter pivotally mounted on said cutter head and adjustable with saidhead into different cutting positions about the head axis, and a motormounted on said base and relative to which said links are swingable foractuating said kerf cutter and for swinging said links relative to saidbase.

'78. In a mining apparatus, a portable base, parallel links pivotallyconnected to said base to swing in a vertical direction relativethereto, a frame supported by said links, a cutter head mounted on saidframe for rotation relative thereto about a horizontal axis, a kerfcutter pivotally mounted on said cutter head and adjustable with saidhead into different cutting positions about the head axis, and devicesfor angularly adjusting the cutter head axis relative to said links.

'79. In a mining apparatus, a portable base, a parallel link structurepivotally connected to said base to swing in a vertical directionrelative thereto, a frame supported by said link structure, a cutterhead mounted on said frame for rotation relative thereto about ahorizontal axis ex tending longitudinally of the apparatus, a kerfcutter pivotally mounted on said cutter head, a motor on said baserelative to which said link structure is swingable, and mechanism drivenby said motor for adjusting said parallel link structure to move saidcutter head into different operative positions while said head axis isalways maintained parallel to a common straight line; I

80. In a mining apparatus, a portable base, parallel links pivotallyconnected to said base to swing in a vertical direction relativethereto,,a frame supported by said links, a cutter head mounted on saidframe for rotation relative thereto about a horizontal axis, a kerfcutter pivotally mounted on said cutter head, said parallel linksmaintaining said wcutter head axis always parallel to a common straightline during swinging of said links about their pivots, and devices fortilting said cutter head about a transverse head axis always parallel toa common straight line during swinging of said links about their pivots.v

82.' In a mining apparatus, a portable base, parallel links pivotallyconnected to. said base to swing in a vertical direction relativethereto, a

frame supportedby said links, a cutter head" mounted on said frame forrotation relative thereto about an axis disposed at right angles ,to aline parallel to the axes of swinging move- -ment of said links, anelongated kerf cutter pivotally mounted on said cutter head for swingingmovement relative thereto and adjustable with said head as the latter isrotated into different cutting positions about the head axis, and amotor mounted on said base and relative to ice Ice

which said links are swingablefor actuating said kerf cutter.

83. In a mining apparatus, a portable base,

to swing in a vertical direction relative thereto,

a frame supported by said links, a cutter head mounted on said frame forrotation relative thereto about an axis disposed at right angles to aline parallel to the axes of swinging movement of said links, a kertcutter pivotally mounted on said cutter head and adjustable with saidhead into different cutting positions about the head axis, and a motormounted on said base and relative to which said links are swingable foractuating said keri cutter and for swinging said links relative to saidbase.

84. In a mining apparatus,'a portable base, a

parallel link structure pivotally connected to said base to swing in avertical direction relative thereto, a frame supported by said linkstructure.

-a' cutter head mounted on said frame for rotation relative theretoabout an axis disposed at right angles to a line parallel to the axes ofswinging movement of said links, a kerf cutter pivotally mounted on saidcutter head, a motor on said base relative to which said link structureis swingable, and mechanism driven by said motor for adjusting saidparallel link structure to move said cutter head into differentoperative positions while said head axis is always maintained parallelto a common straight line.

85. In a mining apparatus, a portable base, an arm structure pivotallymounted on said base to swing in a vertical direction relative thereto,a cutter support rotatably mounted, on the outer extremity of said armstructure, a kerf cutter pivotally mounted on said cutter support toswing relative thereto and adjustable with said cutter support about thesupport axis into horizontal and vertical cutting positions, means forrotating said cutter support about its axis relative to said armstructure, means for swinging said kerf cutter relative to said cuttersupport, means for tilting the kerf cutter about an axis distinct fromthe arm structure pivot axis, from said support axis, and from the axisof kerf cutter swing and lying in an upright plane extendingtransversely of the arm structure to maintain the kerf cutter, whenswinging of the arm structure is initiated with the kerf cutter inaforesaid horizontal cutting position in a horizontal positionirrespectve of the adjusted position. of the arm structure about itsaxis, and means for swinging said arm structure relative to said base)86. In a mining apparatus; a portable base, an arm structure pivotallymounted 0a, said base to swing in avertical direction relative thereto,a

' cutter support rotatably mounted on the outer distinct from the armstructure pivot axis, fromsaid support axis, and from the axis of kerfcutter swing and lying in an upright plane extending transversely of thearm structure to maintain the kerf cutter, when swinging of the armstructure is initiated with the kerf cutter in aforesaid horizontalcutting position in a horizontal position irrespective of the adjustedposition of the arm structure about its axis, and means forswinging saidarm structure relative to said base.

8'1. In a mining apparatus, a portable base, an arm structure pivotallymounted on said base for swinging movement relative thereto, said armstructure extending longitudinally in advance of said base, a supportpivotally mounted on the outer extremity of said arm structure forswinging movement relative thereto about an axis parallel with the armstructure axis, a cutter head mounted on said support for rotationrelative thereto about an axis extending perpendicularly to said supportaxis, and a keri' cutter pivotally-mounted on said cutter headior'swingan arm structure swingable vertically relative to said base in{upright planes extending longitudinally of said base, a supportpivotally mounted on said am structure to swing relative thereto inupright planes extending longitudinally of said base, a cutter headrotatably mounted on said swingable support and rotatable relativethereto to position 'a kerf cutter for cutting in upright planesextending longitudinally 01. said base or in horizontal planes extendinglongitudinally of said base, and a ker! cutter pivotally mounted on saidcutter-head and swingable'relative to the latter on an axis distinctfrom the axes of the other movements specified. r

' F. OSGOOD.

1 CIER'RHIFIIGATIE er eenneertety.

Patent Ne. 21,932,596" @eteber st, 11933.

ennntes rt eseeen.

it is hereby eertitieri tiint errer appears in the printed specificationnt the nbeye numbered patent requiring eerreetien ns teiiews: tags 5tine 6'1), einini 20, strike out the werd transverse' page 6, tine 33,acinm 361), int "n inerieontni nxis" rendiiierizentni axes; nnd tine413, einirn 3i, strike ent tiienrtieie "a" first eeenrrenee; page 7,tine IL, einitn 4MP, sitter 'y'tiireetiens" insert nfeernme; pnge Mi,time 1143, einirn82, niter'eneh 0t tire wereis ime" and "rotated" insertn eenimn; pnge ii, tines 46 and 93, elninis 85 end 86 respeetiveiy,betere "in" insert n enunnin; and Kine 4L6, einint 85, tier"irrespeetve? renti irrespective; and! that the snitil Letters Patentshenlliil lbe rend! with these eerreetiens therein that the same mayenntertn tn the record et tire ense in the Patent @ttiee.

Signed nniiseniedl this 3tin tiny et @eteiier, A ID). 11934 lLesiieFrazer (Sent) Aeting-Cemmissiener ei Patents.

